Multi-degree-of-freedom loading yaw system simulation test bench

Abstract

The utility model discloses a yaw system simulation test bench with multi-degree-of-freedom loading, which comprises a bottom platform, a base, a rotating device, a load transmission device, a yaw system, two axial hydraulic loading devices, a radial hydraulic loading device and a control system, the load transmission device is supported on the bottom platform through the two axial hydraulic loading devices, an upper-layer yaw brake of the yaw system is fixed to the bottom of the load transmission device, a lower-layer yaw brake of the yaw system is fixed to the top of the base, and the rotating device is arranged between the load transmission device and the base. The radial hydraulic loading device is fixed to the bottom platform and makes contact with the peripheral face of the rotating device in an attached mode, and the control system is electrically connected with the yaw system, the two axial hydraulic loading devices and the radial hydraulic loading device. According to the utility model, the test reliability of the yaw system of the wind turbine generator can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbine generator sets, in particular to a multi-freedom-degree-of-freedom loaded yaw system simulation test bench. Background Art

[0002] In recent years, the continuous expansion of wind turbines and the increasing number of megawatt-class models have brought unprecedented challenges to wind turbine design, especially the design of yaw systems. Currently, multi-degree-of-freedom loading test equipment for yaw systems is relatively scarce in the industry, and existing equipment often suffers from insufficient functionality and inability to accurately simulate multi-degree-of-freedom loads. Developing a new multi-degree-of-freedom loading test bench specifically for simulating yaw systems has become a key research direction for improving wind turbine testing reliability and optimizing simulation models. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a multi-degree-of-freedom loaded yaw system simulation test bench. The simulation test bench can apply loads with multiple degrees of freedom to the yaw system to verify whether the electrical drive and mechanical braking performance design of the yaw system can reliably withstand the load and operate effectively, thereby solving the problem of insufficient simulation accuracy.

[0004] The purpose of the utility model can be achieved by adopting the following technical solutions:

[0005] A multi-degree-of-freedom loaded yaw system simulation test bench comprises a bottom platform, a base, a rotating device, a load transfer device, a yaw system, two axial hydraulic loading devices, a radial hydraulic loading device and a control system. The base is fixed to the bottom platform, and the left and right sides of the load transfer device are supported on the bottom platform by two mutually symmetrical axial hydraulic loading devices, and the load transfer device is located directly above the base. The yaw system comprises a plurality of upper yaw brakes and a plurality of lower yaw brakes arranged symmetrically in an upper and lower manner, and a plurality of yaw drives uniformly distributed on the load transfer device along the circumferential direction. The upper yaw brake is fixed to the bottom platform. The yaw brake is fixed to the bottom of the load transfer device, the lower yaw brake is fixed to the top of the base, the rotating device is arranged between the load transfer device and the base, the friction plate of the upper yaw brake is tightly fitted with the upper inner circumference of the rotating device, the friction plate of the lower yaw brake is tightly fitted with the lower inner circumference of the rotating device, the output gear of the yaw drive is meshed with the upper outer tooth surface of the rotating device, the radial hydraulic loading device is fixed to the bottom platform and is in contact with the outer circumference of the rotating device, and the control system is electrically connected to the yaw system, the two axial hydraulic loading devices and the radial hydraulic loading device respectively.

[0006] Furthermore, the rotating device includes a ring gear and a rotating cylinder. The bottom of the ring gear is connected to the top of the rotating cylinder by bolts. The inner circumference of the ring gear is tightly fitted with the friction plate of the upper yaw brake, and its outer tooth surface is meshed with the output gear of the yaw drive. The lower inner circumference of the rotating cylinder is tightly fitted with the friction plate of the lower yaw brake.

[0007] Furthermore, the axial hydraulic loading device includes an axial hydraulic actuator and an axial support tooling, the axial support tooling is fixed on the bottom platform, one end of the axial hydraulic actuator is hinged to the axial support tooling, and the other end thereof extends upward and is hinged to the extension rod of the load transfer device.

[0008] Furthermore, the axial hydraulic actuator is provided with a force sensor for monitoring the force value applied by the axial hydraulic actuator.

[0009] Furthermore, the radial hydraulic loading device includes a radial hydraulic actuator, a supporting roller, a first radial supporting tooling and a second radial supporting tooling, the first radial supporting tooling and the second radial supporting tooling are respectively fixed on the bottom platform, one end of the radial hydraulic actuator is hinged to the first radial supporting tooling, the middle part is hinged to the second radial supporting tooling, and the other end is provided with a supporting roller, and the supporting roller is in contact with the outer peripheral surface of the rotating device.

[0010] Furthermore, the radial hydraulic actuator is provided with a force sensor for monitoring the force value applied by the radial hydraulic actuator.

[0011] Furthermore, a plurality of mounting holes for mounting the yaw drive are reserved in the circumferential direction inside the load transfer device, and two extension rods for being hinged to the two axial hydraulic loading devices are symmetrically arranged on the outer circumference thereof.

[0012] Furthermore, a torque sensor is provided inside the yaw drive for monitoring the output torque value of the yaw drive.

[0013] Furthermore, the bottom platform is cast by reinforced concrete.

[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0015] 1. Comprehensive simulation capability: The simulation test bench of this utility model can fully simulate the multi-degree-of-freedom complex load conditions encountered by the yaw system of a wind turbine in an actual operating environment, ensuring the authenticity and comprehensiveness of the test environment.

[0016] 2. Performance verification: The simulation test bench of this utility model can effectively verify the drive and braking performance design of the yaw system, ensuring that it can operate stably and reliably when facing loads under actual working conditions, thereby enhancing the overall safety and efficiency of the system.

[0017] 3. Improve data accuracy and model reliability: Using the simulation test bench of the utility model to conduct wind turbine tests can significantly improve the accuracy and reliability of test data, further enhance the simulation model's ability to reflect the actual operating status, and provide solid data support for technical optimization and product design in the wind power industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional schematic diagram of the simulation test bench.

[0019] Figure 2 This is the main view of the simulation test bench.

[0020] Figure 3 This is a side view of the simulation test bench.

[0021] Figure 4 A top view of the simulation test bench.

[0022] Figure 5 for Figure 4 Middle AA section view. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] like Figures 1 to 5As shown, this embodiment provides a multi-degree-of-freedom loaded yaw system simulation test bench, including a bottom platform 1, a base 2, a rotating device, a load transfer device 5, a yaw system, two axial hydraulic loading devices 9, a radial hydraulic loading device 10 and a control system (not shown in the figure). The base 2 is fixed to the bottom platform 1 by bolts. The bottom platform 1 is made of reinforced concrete and can withstand all loads such as axial force, radial force, bending moment, torque, etc. transmitted from above. The left and right sides of the load transfer device 5 are supported on the bottom platform 1 by two symmetrical axial hydraulic loading devices 9, and the load transfer device 5 is located directly above the base 2. The yaw system includes a plurality of upper yaw brakes 6 and a plurality of lower yaw brakes 7 arranged symmetrically in an upper and lower direction, and a plurality of yaw drives 8 uniformly distributed on the load transfer device 5 along the circumferential direction. The upper yaw brake 6 is fixed by bolts. It is fixed at the bottom of the load transfer device 5, the lower yaw brake 7 is fixed to the top of the base 2 by bolts, and the rotating device is arranged between the load transfer device 5 and the base 2. The friction plate of the upper yaw brake 6 is tightly fitted with the upper inner circumference of the rotating device, and the friction plate of the lower yaw brake 7 is tightly fitted with the lower inner circumference of the rotating device. The upper and lower yaw brakes play a radial limiting function on the rotating device. The output gear 801 of the yaw drive 8 is engaged with the upper outer tooth surface of the rotating device. The radial hydraulic loading device 10 is fixed on the bottom platform 1 and is in contact with the outer circumference of the rotating device. The control system is electrically connected to the yaw system, the two axial hydraulic loading devices 9 and the radial hydraulic loading device 10 respectively. The control system controls the action of the yaw system and controls the axial hydraulic loading device 9 and the radial hydraulic loading device 10 to load the yaw system.

[0025] Specifically, the rotating device includes a ring gear 3 and a rotating cylinder 4. The bottom of the ring gear 3 is connected to the top of the rotating cylinder 4 by bolts. The inner circumference of the ring gear 3 is tightly fitted with the friction plate of the upper yaw brake 6, and its outer tooth surface is meshed with the output gear 801 of the yaw drive 8. The lower inner circumference of the rotating cylinder 4 is tightly fitted with the friction plate of the lower yaw brake 7.

[0026] Specifically, the axial hydraulic loading device 9 includes an axial hydraulic actuator 901 and an axial support fixture 902. The axial support fixture 902 is fixed on the bottom platform 1. One end of the axial hydraulic actuator 901 is hinged to the axial support fixture 902, and the other end thereof extends upward and is hinged to the extension rod 501 of the load transfer device 5. The load transfer device 5 is supported by the axial hydraulic actuator 901 and the axial support fixture 902 and the axial load is transferred to the yaw system. At the same time, different loads are applied through two symmetrical axial hydraulic loading devices 9, which can form a bending moment acting on the yaw system.

[0027] Furthermore, a force sensor for monitoring the force applied by the axial hydraulic actuator 901 is provided on the axial hydraulic actuator 901 .

[0028] Specifically, the radial hydraulic loading device 10 includes a radial hydraulic actuator 1001, a supporting roller 1002, a first radial supporting tooling 1003 and a second radial supporting tooling 1004. The first radial supporting tooling 1003 and the second radial supporting tooling 1004 are respectively fixed on the bottom platform 1, and one end of the radial hydraulic actuator 1001 is hinged to the first radial supporting tooling 1003, and the middle part is supported by the second radial supporting tooling 1004 and hinged to the second radial supporting tooling 1004. The second radial supporting tooling 1004 serves to limit the tangential displacement of the radial hydraulic actuator 1001. A supporting roller is provided at the other end of the radial hydraulic actuator 1001. The supporting roller is in contact with the outer peripheral surface of the rotating device, and a radial load is applied to the yaw system through the radial hydraulic actuator.

[0029] Furthermore, the radial hydraulic actuator 1001 is provided with a force sensor for monitoring the force value applied by the radial hydraulic actuator 1001 .

[0030] Specifically, the yaw drive 8 includes a motor, a reducer, and an output gear 801 connected in sequence. A torque sensor for monitoring the output torque value of the yaw drive 8 is provided inside the yaw drive 8 .

[0031] Specifically, a plurality of mounting holes for mounting the yaw drive 8 are reserved circumferentially inside the load transfer device 5. The yaw drive 8 is fixed to the inside of the load transfer device 5 by bolts, and its output gear 801 passes through the mounting holes and meshes with the outer tooth surface of the ring gear 3. Two extension rods 501 are symmetrically arranged on the outer circumference of the load transfer device 5, which are respectively used to be hinged to the two axial hydraulic loading devices 9.

[0032] The method of using the above simulation test bench is as follows:

[0033] 1) According to the predetermined test conditions, select key load parameters such as axial force, radial force and bending moment, and accurately input these data into the control system of the simulation test bench.

[0034] 2) The control system calls the input load data and calculates the precise load required by each hydraulic actuator. Then, it sends instructions to the hydraulic actuator through the control system and implements the predetermined multi-degree-of-freedom load loading scheme by adjusting the pressure oil of the hydraulic actuator.

[0035] 3) The force sensors on each hydraulic actuator collect and feed back pressure data to the control system in real time. The system compares the measured pressure data with the initial command data and uses a closed-loop control strategy to fine-tune the command data until the measured pressure data matches the preset load data.

[0036] 4) Once the multi-DOF load reaches the preset target value and remains stable, the control system sends a start command to the yaw system, immediately starting the motor and effectively increasing the output torque through the reducer, driving the output gear to tightly engage the ring gear, thereby driving the ring gear and rotating cylinder to rotate smoothly. Simultaneously, the yaw drive's built-in torque sensor continuously monitors and provides real-time feedback on the current output torque value, ensuring accurate and reliable power transmission.

[0037] 5) By observing the performance of the yaw system and combining it with the real-time collected load data and drive torque data, we conduct performance analysis to fully verify whether the drive and braking performance design of the yaw system under actual working conditions meets the standards, providing detailed data support and theoretical basis for subsequent design optimization and improvement.

[0038] The utility model verifies the mechanical braking and electrical drive capabilities of the yaw system by simulating various multi-degree-of-freedom loads that the yaw system may encounter in an actual wind farm environment, and adjusts and improves the simulation model of the wind turbine according to the test data, thereby improving the accuracy of the simulation and facilitating the early development and verification of the design of the wind turbine yaw system.

[0039] The above is only a preferred embodiment of the present utility model patent, but the protection scope of the present utility model patent is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the scope disclosed by the present utility model patent based on the technical solution and the utility model patent concept of the present utility model patent, which falls within the protection scope of the present utility model patent.

Claims

1. A multi-degree-of-freedom loaded yaw system simulation test bench, characterized by: The invention comprises a bottom platform, a base, a rotating device, a load transfer device, a yaw system, two axial hydraulic loading devices, a radial hydraulic loading device and a control system. The base is fixed on the bottom platform. The left and right sides of the load transfer device are supported on the bottom platform by two symmetrical axial hydraulic loading devices, and the load transfer device is located directly above the base. The yaw system comprises a plurality of upper yaw brakes and a plurality of lower yaw brakes arranged symmetrically up and down, and a plurality of yaw drives uniformly distributed on the load transfer device along the circumferential direction. The upper yaw brake is fixed to the load transfer device. The bottom, the lower yaw brake is fixed to the top of the base, the rotating device is arranged between the load transfer device and the base, the friction plate of the upper yaw brake is tightly fitted with the upper inner circumference of the rotating device, the friction plate of the lower yaw brake is tightly fitted with the lower inner circumference of the rotating device, the output gear of the yaw drive is meshed with the upper outer tooth surface of the rotating device, the radial hydraulic loading device is fixed on the bottom platform and is in contact with the outer circumference of the rotating device, and the control system is electrically connected to the yaw system, the two axial hydraulic loading devices and the radial hydraulic loading device respectively.

2. The multi-degree-of-freedom loaded yaw system simulation test bench according to claim 1, characterized in that: The rotating device includes a ring gear and a rotating cylinder. The bottom of the ring gear is connected to the top of the rotating cylinder by bolts. The inner circumference of the ring gear is tightly fitted with the friction plate of the upper yaw brake, and its outer tooth surface is meshed with the output gear of the yaw drive. The lower inner circumference of the rotating cylinder is tightly fitted with the friction plate of the lower yaw brake.

3. The multi-degree-of-freedom loaded yaw system simulation test bench according to claim 1, characterized in that: The axial hydraulic loading device includes an axial hydraulic actuator and an axial support tooling, wherein the axial support tooling is fixed on the bottom platform, one end of the axial hydraulic actuator is hinged to the axial support tooling, and the other end thereof extends upward and is hinged to the extension rod of the load transfer device.

4. The multi-degree-of-freedom loaded yaw system simulation test bench according to claim 3, characterized in that: The axial hydraulic actuator is provided with a force sensor for monitoring the force value applied by the axial hydraulic actuator.

5. The multi-degree-of-freedom loaded yaw system simulation test bench according to claim 1, characterized in that: The radial hydraulic loading device includes a radial hydraulic actuator, a supporting roller, a first radial supporting tooling and a second radial supporting tooling, wherein the first radial supporting tooling and the second radial supporting tooling are respectively fixed on the bottom platform, one end of the radial hydraulic actuator is hinged to the first radial supporting tooling, the middle part is hinged to the second radial supporting tooling, and the other end is provided with a supporting roller, which is in contact with the outer peripheral surface of the rotating device.

6. The multi-degree-of-freedom loaded yaw system simulation test bench according to claim 5, characterized in that: The radial hydraulic actuator is provided with a force sensor for monitoring the force value applied by the radial hydraulic actuator.

7. The multi-degree-of-freedom loaded yaw system simulation test bench according to claim 1, characterized in that: A plurality of mounting holes for mounting the yaw drive are reserved in the interior of the load transfer device along the circumferential direction, and two extension rods for being hinged to two axial hydraulic loading devices are symmetrically arranged on the outer circumferential surface thereof.

8. The multi-degree-of-freedom loaded yaw system simulation test bench according to claim 1, characterized in that: A torque sensor is provided inside the yaw drive for monitoring the output torque value of the yaw drive.

9. The multi-degree-of-freedom loaded yaw system simulation test bench according to claim 1, characterized in that: The bottom platform is formed by pouring reinforced concrete.

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